Artifacts 12
Every copy this mystery rests on, each with its own key and its distance from the original.
Photo1 step from object
Big Ear Radio Observatory and North American AstroPhysical Observatory · Public domain
Photo1 step from object
Ohio State University Radio Observatory · publisher
Photo1 step from object
Ohio State University Radio Observatory · publisher
Photo1 step from object
Big Ear Radio Observatory and North American AstroPhysical Observatory · Public domain
Photo1 step from object
Big Ear Radio Observatory and North American AstroPhysical Observatory · Public domain